CVE-2026-18821

Name of the Vulnerable Software and Affected Versions IBM PowerVM Hypervisor version FW1120.00 IBM PowerVM Hypervisor versions FW1110.00 through FW1110.30 IBM PowerVM Hypervisor versions FW1060.00 through FW1060.80 IBM PowerVM Hypervisor versions FW950.00 through FW950.H2

Description A flaw exists in the partition firmware during the network boot process. An unauthenticated attacker located on the same network as a partition performing a network boot can send a malformed packet to execute arbitrary code within the partition firmware. This action can compromise all subsequent components loaded by that partition. This issue only affects partitions actively undergoing network boot; other partitions and the managed system remain unaffected.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.